40 lines
1.2 KiB
C
40 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef SOUND_FIREWIRE_ISO_RESOURCES_H_INCLUDED
|
|
#define SOUND_FIREWIRE_ISO_RESOURCES_H_INCLUDED
|
|
|
|
#include <linux/mutex.h>
|
|
#include <linux/types.h>
|
|
|
|
struct fw_unit;
|
|
|
|
/**
|
|
* struct fw_iso_resources - manages channel/bandwidth allocation
|
|
* @channels_mask: if the device does not support all channel numbers, set this
|
|
* bit mask to something else than the default (all ones)
|
|
*
|
|
* This structure manages (de)allocation of isochronous resources (channel and
|
|
* bandwidth) for one isochronous stream.
|
|
*/
|
|
struct fw_iso_resources {
|
|
u64 channels_mask;
|
|
/* private: */
|
|
struct fw_unit *unit;
|
|
struct mutex mutex;
|
|
unsigned int channel;
|
|
unsigned int bandwidth; /* in bandwidth units, without overhead */
|
|
unsigned int bandwidth_overhead;
|
|
int generation; /* in which allocation is valid */
|
|
bool allocated;
|
|
};
|
|
|
|
int fw_iso_resources_init(struct fw_iso_resources *r,
|
|
struct fw_unit *unit);
|
|
void fw_iso_resources_destroy(struct fw_iso_resources *r);
|
|
|
|
int fw_iso_resources_allocate(struct fw_iso_resources *r,
|
|
unsigned int max_payload_bytes, int speed);
|
|
int fw_iso_resources_update(struct fw_iso_resources *r);
|
|
void fw_iso_resources_free(struct fw_iso_resources *r);
|
|
|
|
#endif
|